<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html 
     PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html>
<head>
  <title>handle_primary_key (relation_transform.rb)</title>
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
  <link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" />
</head>
<body class="standalone-code">
  <pre><span class="ruby-comment cmt"># File relation_transform.rb, line 58</span>
 <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">handle_primary_key</span>(<span class="ruby-identifier">first_table_primary_key</span>,<span class="ruby-identifier">first_table</span>,<span class="ruby-identifier">new_connection</span>)
        <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">primary_key_column_exists</span>(<span class="ruby-identifier">first_table_primary_key</span>,<span class="ruby-identifier">first_table</span>,<span class="ruby-identifier">new_connection</span>) <span class="ruby-operator">==</span> <span class="ruby-value">1</span>
                <span class="ruby-identifier">first_row_specs</span> = <span class="ruby-identifier">get_the_col_spec_for_single_col</span>(<span class="ruby-identifier">first_table_primary_key</span>,<span class="ruby-identifier">first_table</span>,<span class="ruby-identifier">new_connection</span>)
        <span class="ruby-keyword kw">elsif</span>  <span class="ruby-identifier">primary_key_column_exists</span>(<span class="ruby-identifier">first_table_primary_key</span>,<span class="ruby-identifier">first_table</span>,<span class="ruby-identifier">new_connection</span>) <span class="ruby-operator">==</span> <span class="ruby-value">2</span>
                <span class="ruby-identifier">puts</span> <span class="ruby-node">&quot;#{first_table} already hsa primary key other than the one you have mentioned.&quot;</span>
                <span class="ruby-identifier">first_row_specs</span> = <span class="ruby-value">0</span>
        <span class="ruby-keyword kw">else</span>
                <span class="ruby-identifier">new_connection</span>.<span class="ruby-identifier">query</span>(<span class="ruby-node">&quot;ALTER TABLE #{first_table} ADD #{first_table_primary_key} int(11)&quot;</span>)
                <span class="ruby-identifier">first_row_specs</span> = <span class="ruby-value str">&quot;int(11)&quot;</span>
                <span class="ruby-identifier">puts</span> <span class="ruby-node">&quot;For #{first_table} non-existant column has been made as aprimary key.&quot;</span>
                <span class="ruby-identifier">puts</span> <span class="ruby-value str">&quot;Application has generated new column with same name&quot;</span>
        <span class="ruby-keyword kw">end</span>            
        <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">first_row_specs</span>
 <span class="ruby-keyword kw">end</span></pre>
</body>
</html>